Here is a very generic question and can be related any CRM use case.
I was thinking about the scenarios in which CRM logs can be used, for example when I look at Salesforce app, it mostly has information about dashboard performance and stats, login stats, reports downloaded etc..
What are the use cases derived from these dashboards?
The Splunk App for Salesforce https://splunkbase.splunk.com/app/1931/ uses data from the "Salesforce Event Log File API" to build some starter dashboards. These starter dashboards can be built upon if required.
Using the Salesforce Event Log File data here are some example questions you could ask of the data -